That is because they came to believe, and then renounced (their faith). So their hearts were sealed; and now they do not understand.
यह इस कारण कि वे ईमान लाए, फिर इनकार किया, अतः उनके दिलों पर मुहर लगा दी गई, अब वे कुछ नहीं समझते